Fuse or fusible resistor?

Used in the battery (-) lead of a handheld scope. Schematics unpublished.
Physically similar to a 1/4 W resistor, color light green. Marked "IE7A" or
"1E7A".
Google returns slim results, none promising.
What type is this?
Thanks, Dave
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In article

USE COMPLETE SENTENCES!
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An old man would be better off never having been born.

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On 6/26/2010 9:56 PM Salmon Egg spake thus:

A grammar nanny, eh?
You must be a big hit at parties ...
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On Sat, 26 Jun 2010 21:56:44 -0700, Salmon Egg

Idiot ^^^^^ Not a complete sentence ^^^^^^^^^^^^^^^^^^^^^^^ Not a complete sentence
Etc.
John
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On Sat, 26 Jun 2010 22:09:36 -0700, John Larkin

I should have figured that not a goddamned soul actually tried to answer the question.
It sounds like a 'soft-fuze'. That resets itself after tripping.
There is also a similar device used in hair dryer circuitry.
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Could that be because no one knew what tghe question was?
Idiot
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wrote:

Jeez. Yer an idiot.
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wrote:

They are complete s
Just not ones that you
What I am writing, are incomplete sen
And don't
We don't like that on sci
Arf
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"DaveC" <

** Sounds like a Pico Fuse:
http://media.digikey.com/photos/Littelfuse%20Photos/PICO%20II%20R251%20SERIES.jpg
Come in fast and very fast ratings with amps rated from 1A to about 15A.
When they blow, you need a soldering iron to replace them.
There are various Asians clones too.
..... Phil
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"DaveC"

** Sure that is not the other way around ?
Pico Fuse would use " 7A LE " as a the marking for a 7 amp fuse.
.... Phil
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or
I take it , that its blown and I also take it that its not charred (fusible R don't char or even discolour AFAIK) Desolder it and scrape an axial line along its length . Then DVM resistance check from either end. If a fusible resistor then maximum R read is what its value was near enough. FR breaks are usually to one end, normal R usually in the middle. Although green is often axial inductor.
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://diverse.4mg.com/index.htm
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No, I don't have one. I threw it out with the old battery. :-( Someone on-line volunteered to describe the one from his scope. I'll not ask him to do a post-mortem on a working fuse. ;-)
Thanks, Dave
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Surely (s)he can MEASURE the one (s)he has?
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They won't catch fire but I have seen them char slightly. It's also common for them to crack or blow out a small chip of ceramic if something shorts and exposes them directly to the line voltage.
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DaveC wrote:

Fuse. Ratings of these beasts in equipment is almost NEVER disclosed - like a company secret more precious than any other secret they have. Measure current draw and see what the maximum is during any operations, double that for a guide in choosing "first guess" replacement.
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wrote:

The axial leaded jobs I have seen in hair dryers are high current jobs with reed switches inside them. Not the soft break jobs.
The biggest soft device I recall was 3 Amps.
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And that's why markings are so important. You can circumvent any need to measure.
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Oh man, has science really come to this? >:)
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DaveC wrote:

<http://www.littelfuse.com/data/en/Product_Catalogs/Chapter10SurfaceMountFuses.pdf and several other fuse manufacturers list E as .375A. If you read the data sheets, you should be able to determine what family you need.
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Obviously, it's 10,000,000 amperes ;^)
Tim
-- Deep Friar: a very philosophical monk. Website: http://webpages.charter.net/dawill/tmoranwms
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